What does the Ideal Mini F43 fault code mean?
The F43 fault code on the Ideal Mini boiler indicates a central heating temperature fault, which suggests that the boiler is unable to reach or maintain the desired temperature for the heating system. This can lead to inadequate heating performance and may require immediate attention.
Common Causes
- Faulty Temperature Sensor: The temperature sensor may be malfunctioning, providing incorrect readings to the boiler’s control system.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent proper heat transfer, causing the boiler to struggle with temperature regulation.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any issues related to gas or electrical components. However, if you suspect a pressure issue, you can check the pressure gauge and reset the boiler if necessary, ensuring it is within the recommended range.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F43 fault could range from £150 to £300, depending on whether a temperature sensor replacement or heat exchanger cleaning is required. This estimate reflects the cost of parts and labour for a qualified engineer.